The storm also claimed three lives in SC and two in Georgia.
Georgia Gov. Nathan Deal has already declared a state of emergency for all 159 counties as Irma barrels toward the state.
"Wind speeds that high can literally lift furniture from the ground and turn them into projectiles so that's why we are concerned for your safety", he said. There were occasional slow downs on Interstate 77 between Charlotte, North Carolina, and Columbia. "Jose is then expected to move slowly toward the east and southeast Tuesday into Wednesday".
Tybee Island City Manager Shawn Gillen said waters were receding quickly, but numerous 3,000 residents' homes were flooded.
Even with Irma's weakening, the tropical depression is still expected to bring heavy rainfall across a widespread area, as it flooded parts of coastal Georgia and SC, including Savannah and Charleston, on Monday. More than 100,000 customers were without power in Georgia and over 80,000 in SC. That was well down from the peak of around 250,000 outages late Monday as Irma's winds moved across the state.
After flying over the Keys Monday, Florida Gov. Rick Scott described overturned mobile homes, washed-ashore boats and flood damage. That's 64 percent of the state's power customers, and there are several counties where 80-90 percent of customers are without power.
The news is better along the coast.
Between 2,000 and 3,000 utility workers from out-of-state are staying at BB&T Stadium in Broward County, which is home to the National Hockey League's Florida Panthers, said Beyersdorf.
All Florida highways are now open - if vehicle owners can find gas, officials said Tuesday. He worked with the Forestry and Beautification Division of the city's Public Works Department.
During its march up Florida's west coast, Irma swamped homes, uprooted trees, flooded streets, snapped miles of power lines and toppled construction cranes. The company said, however, it could request an increase if storm restoration costs exceed $800 million in any calendar year. And the governor said effects on the southwest coast, including in Naples and Fort Myers, was not as bad as feared.
"Immokalee is hurting right now, so power, power power", he said. His wife had called 911 saying he'd had a heart attack.
Charleston, South Carolina, and Savannah, Georgia, two popular tourist destinations on the eastern side of the storm, saw flooding because onshore winds pushed water back into rivers, said CNN meteorologist Taylor Ward. Firefighters later took her to the hospital.
At least 37 others died from Irma in the Caribbean, including at least 10 in Cuba. Authorities say a man was hit by a falling limb while clearing debris near his home Monday afternoon in Calhoun Falls.
Gov. Henry McMaster also says floodwaters and downed trees have closed more than 80 roads in SC.
McMaster said Tuesday morning the state appeared to survive the storm without significant damage.
The low-lying barrier islands would be inundated if Irma's storm surge reaches forecast heights of as high as 15 feet (4.6 meters).
After Irma left the Keys Sunday morning, it moved north, passing over Naples, which recorded a 142 miles per hour wind gust.
Officials say it's too early to tell exactly how bad the situation is but they are expecting it to be a long road to recovery.
After that, they fix the infrastructure serving smaller groups and neighborhoods.
Online traffic maps already showed a 10-mile (16-kilometer) backup reaching almost into North Carolina.
While the Keys were under mandatory evacuation orders as Irma neared, not everyone left. They headed back out later in the day. As of 5 a.m. Monday, about 355 miles northeast of the Grand Turk Island.
Floodwaters are standing on parts of St. Simons Island, where many have also reported no electricity. North Carolina: More than 166,000 customers, according to Duke Energy South Carolina: 233,000 customers, according to Duke Energy and SCE&G.
The South Carolina Electric Cooperatives report that about 63,000 customers are without service.
At least four people are believed to have lost their lives as a result of the storm in Florida.